基于MODIS影像的色林错湖面积变化及成因  

Area change of Selincuo Lake and its forming reasons based on MODIS data

作　　者：拉巴[1] 陈涛[1] 拉巴卓玛[1] 次珍 

机构地区：[1]西藏高原大气环境科学研究所,西藏拉萨850001 [2]拉萨市气象局,西藏拉萨850001

出　　处：《气象与环境学报》2011年第2期69-72,共4页Journal of Meteorology and Environment

基　　金：国家自然科学基金(40761005);中国气象局新技术推广项目(CMATG2008M52);西藏自治区气象局2009年局设项目共同资助

摘　　要：利用2002—2009年EOS/MODIS卫星遥感资料和气温、地表温度气象资料,对色林错湖面积变化进行分析,并探讨了其成因。结果表明:西藏那曲地区色林错湖(包括雅根错湖)面积在近8 a呈显著的扩大趋势,从2002年的1955.49 km2增至2009年的2197.46 km2,8 a内增长了241.97 km2,现已超过纳木错湖面积,成为西藏第一大咸水湖。气温、地表温度升高导致冰雪融化和冻土层变浅是湖泊上涨的主要原因。通过研究证明了EOS/MODIS资料在研究湖泊变化中具有较好的指示作用。According to EOS/MODIS satellite remote sensing data, air temperature and surface temperature data from weather stations from 2002 to 2009, the area changes of Selincuo Lake were analyzed, and its forming reasons were discussed. The results indicate that the areas of Selincuo Lake （ including the adjacent Yagencuo Lake） in Naqu of Tibet autonomous region have obviously increased from 2002 to 2009. The areas increase from 1955.49 km2 in 2002 to 2197.46 km2 in 2009. The difference is 241.97 km2 during the 8 years. The areas of Selincuo Lake are larger than that of Namucuo Lake, and it becomes the largest saltwater lake in Tibet autonomous region now. The increases of air temperature and surface temperature lead to ice and snow melting, permafrost melting, which are the main reasons resulting in the lake rising. The above analysis shows that EOS/MODIS data are suitable to discuss the areas changes of lakes.

关 键 词：气候变化 MODIS影像 色林错湖 西藏 

分 类 号：P237[天文地球—摄影测量与遥感]